Compressed-air engine



Sept. 30, 1930. B. ARCHER COIPRESSED AIR ENGINE Filed Dec. 5, 1929 2Sheets-Sheer. 1

I In v enior v 7077? Jraer A iiorney COMPRESSED AIR ENGINE Filed Dec. 3,1929 2 Sheets-Sheet 2' In venior lywrfyg-A'wfi/er By Attorney iii)Patented Sept. 30, 1930 UNETE'D STA-TES- PATENT OFFICE.

I-IARRYI-B. ARCHER; or nononvrmzn, NEW YORK oomrnnssnn-nmnnemnApplication filed. December 3,1929. Serial; 110-. 411;.3Q4;

This invention. relatesrto compressed air,

engines andmore particularly to. devices of this character of thereciprocating piston type 'Wherein'a piston is mounted for recip- 5rocatory movementin=a cylinden intowhieh the charge of compressed, airis alternately admitted on opposite sides oi the piston A in a mannerto. actuatethe same.

7 An important object ofi-the inventionis to 1 provide,. ina mannerashereinaztterset forth, a compressed'air: engine {of the aforementionedcharacter h avingc -associ ate d therewith 'a valved compressed airreservoir or tank wherein the valves are provided w-ithimeans 15actuated by the motor fori properly operat+ V ingthe' same. 1. 1 i

. Another important object of the invention resides injthe provision ofautomatically operated meansin the form" of a reciprocat- 4 ing valve'for exhausting the air from the cylinder.-

- .I jOther objectsof the invention are to providea compressed airengine; which. will. be simple in construction, strong, durable,efficient' in -its use and. which maybemanufactured atlow cost. Stillfurther objects and advantages of the invention will become apparentfrom a study of the following specification, taken inc'onneotion withthe accompanying drawings wherein like characters-act" referencedesignate a corresponding parts V throughout the several views, andwherein -Figure 1 isa view inrside elevation of'a I comp'ressed airengineconstructed in accordance with thisinv'entionr f I Figure 2 is avertical cross-sectional view, taken substantially on the line 2-2- ofFigure 1 and looking in the direction of the arrows. a

Figure 3 is a vertical tional view. thereof longitudinal sec- Figure-tis a. detail view in side elevation showingthe' means for connecting theintake valve operating lever With said intake valve in a mannertoactuate the same. r Figure '5. is an end view of Figure v Figure 6 isan." enlarged detail view in tc perspeq iye ot j the reciprocating.exhaust valve th'e samebeingv shown turned upside down, i i p g VReferring to the drawings. in detail, the referencecharacter ldesignates an elongated cylinder having one endclosed through the 5medium of :a removable head 2'secured by the threaded bolts 8 to aflangev 4: on the adjacent endofthe' cylinder. The head 2. is providedwith. acentrally, disposed opening and .a-p ack'.- ing flangefithroughWhichslidably extends a-rod Gupon theinner end of whichis-mountedithepistonl7;

Adjacent itsoppo'site end; the: cylinder. l-is provided with. laterallyextending internallythreade'd necks8 forthereception ofone end of thethreaded conductor pipe designated generally by the: reference character9.. The .upper'ends'of theiair conductor pipe 9. are threadedinto theside of a compressed air. reservoir on tanklO-throngh the medium of thelaterally extending; internally threaded necksll'and'th'e upper end ofsaid pipe'9 extends a: slight: distance into :the. reservoir lOi-toprovide a valve. seat 12 (see Figure The. opposite. endsof the reservoir10 are 79 closed by removable heads 13 secured to the flanges l4 bythe.threaded .bolts l5i Brackets i 16 are-vertically disposed'in thereservoir 10 at a point adjacent the valve seat 12 and pivotally mountedon the upper endportion of said bIELCkGUlSi-fl valvel adaptedito'seat ontheadjacent seat l2 for controlling the passage of air therethrough."These brackets 16 arebifurcated and the valves 17 are pivotally.mounted therebetween, as at 18; andsaid valves are provided with arearwardextension/ l9 betweeniwhich extension", adj acent" its free end,andsthewall ofthe reservoir *is inengaged onsaid extension19; The pushrods 23have their upperends provided with bifurcated heads 24 forthereception. of the downwardly extending protuberances- 25 i ontheopposite' end of. rockingbeami26 :whioh necks 8.

is pivotally mounted for vertical adjustment on the reservoir throughthe medium of a threaded standard 2? which has its lower end threadedlyengaged in a socket 28 on the reservoir and the upper end of which isprovided with a bifurcated head 29 between the furcations oi which therocking beam 26 is pivotally supported, as at 30. The nut 31 is threadedon the standard 27 for engagement with the upper end 01": the socketmember 28 for securing the standard in adjusted position.

Exhaust passages 32 communicate with the cylind 1 adjacent its oppositeend and at a point diametrically opposed to the threaded As seen inFigure 3 of the drawings. the passages 32 extend longitudinally in thelower wall of the cylinder 1 toward the center thereof and are thendirected outwardly and communicatewith the interior of a valve chest 33which is secured, as at 3 1 tosaid cylinder 1. The valve chest 33 isprovided with a removable closure plate 35 secured thereto by the bolt36 and provided with a flange 37 which projects into the valve chestadjacent the wall thereof and terminates in spaced relation with respectto the wall of the cylinder 1. clearly seen in Figure 3 of the drawings.The tree end of the flange 37 prov des a shoulder in the valve chest 33upon which is mounted for reciprocation a. slide valve 38 which isprovided with a transverse port 39 adapted to be brought into registrywith the outer ends of the exhaust passages 32. The valve 38 isprovided, on its lower de, with depending ears 40 provided withlongitudin lly extending slots l1 for slidablv receiving the T-heads 4-2of the rods 43 which slidahly extend through one end wall of the valvechest 33, as at 4st. A supporting arm 45 is rigidly secured to theremovable head ot the cvlinder 1 and has pivotallv mounted on its freeend and at the intermediate portion thereof a lever 46 which isoperativelv connected with the piston rod 6 throug h the medium of a pinand slot conuection 47. The lower end of the lever 16 is oierativelyconnected to the rod 43 through the medium o the connecting link 48. Anexhaust pipe "-9 communicates with the interior of the valve chest 33 onthe lower side thereof.

A supporting arm 50 is rigidly secured, as at 51. to one of theremovable heads 13 of the reservoir 10 and on the free end of sa d 50the intermediate portion of an actuatine lever 52 s pivotally mounted,as at 53. One end of the lever 52 is operatively connected to the pistonrod 6 through the med um of he pin and slot connection 54. A verticallydisposed standard 55 extends up wardlv from the top of the reservoir 16and is provided with a. long tudinally extending head 56 on its upperend having upstanding flanges m on its longitudinal side to provide achannel for the slidable reception of a block 58 (see Figures 4 and 5).As seen in Figure 5 of the drawings, the head 56 is disposed adjacentthe rocker beam 26 and on one side thereof. As seen most clearly inFigure 4, the block 59 is provided with a slot or recess 59 whichcomprises a pair of horizontally disposed longitudinally extendingportions which have communications with each other through a diagonallyextending portion 60.

The slot 59 is for the reception of a horizontally disposed pin 61 whichprojects laterally from the adjacent side of the rocking beam26. Theblock 58 is provided with a rearward extension 62 in the free endportion of which is disposed a transversely extending pin 63 whichprojects from the opposite side of the extension. A link 64: is provided with a bifurcated free end portion which embraces the extension 62of the block 58 and is provided with a longitudinally extending slot ineach of its furcations for the reception of the projecting end of thepin 63 and said slots are designated by the reference character 65. Theopposite end of the element 64: is pivot-ally connected to the adjacentend of the actuating lever 52 as at 66. Means for supplying air undercompression to the reservoir 10 is provided through the medium of avalved inlet 67 which is controlled through the medium of an actuatingrod 68 pivotally connected to an arm 69 of the valve which is disposedin the air supply conduit 67 adjacent said'reservoir.

When the engine is in. operation, the piston 7 reciprocates in thecylinder 1 and the lever 52 is rocked on its pivot 53 through the mediumof the pin and slot connection 54 with the piston 6 and the slot 58 iscaused to reciprocate on the head 56 of the standard 55. The rockingbeam 26 is thus actuated through the medium of the laterally projectingpin 61 which is disposed in the recess or slot 59 of the block 58, saidpin moving into the different horizontally disposed portions of therecess as the slot reciprocates for imparting movement to the rockingbeam 26. The beam 26 alternately unseats the valves 17 and air underpressure which is stored in the reservoir 10 passes through the conduit9 and alternately enters the cylinder 1 on opposite sides of the piston7, as will be obvious. The reciprocation of the piston 7 and the rod 6also imparts movement to the lever 46 through the medium of the pin andslot connection 47 for reciprocating the valve 38 in the valve chest 33and the movement of said valve is so timed with respect to the piston 7and the valves 17 and as air is admittedto the cylinder on one side ofsaid piston the port 39 in the valve registers with the exhaust passage32 which has communication with the opposite side of the piston. Theslot in the element 64 travels over the ends of the pin 63 in theextension of the block 58 and said block is of such length that the head56 will be actuated only when the lever 52 approaches the end of itsrearward and forward strokes. Air from any suitable source is storedunder pressure in the reservoir 10 through the me- I dium of the valvedinlet 67. It is further pointed out that the connection provided by thecross head 42 in the slots 41 of the valves 38 provide means wherebysaid valves will be actuated only when the lever 46' approaches the endof each stroke.

It is believed that the many advantages of a compressed air engineconstructed in accordance with this invention will be readilyunderstood, and although the preferred embodiment of the invention is asillustrated and described, it is to be understood that changes in thedetails of construction may be had which will fall-within the scope ofthe invention as claimed.

lVhat is claimed is 1. A compressed air engine of the characterdescribed comprising a cylinder, a .piston mounted for reciprocationinthe cylinder, a piston rod connected to the piston, a reservoiradapted to contain air under pres sure mountedon the cylinder in spacedparallelism therewith, pipes communicating with the reservoir and withthe cylinder adjacent opposite ends of the latter, valve seats disposedin the reservoir on the ends of the pipes, pivoted valves disposedwithin the reservoir and adapted for engagement on the valve seats,integral tails on thevalves, coil springs engaged with the tails and theadjacent wall portions of the reservoir for yieldingly urgthe reservoir,the opposite ends of said beam in engagement with the adj acent ends ofthe push rods for alternately opening the valve in the reservoir, meansfor rocking said beam comprising a standard mounted on the reservoir, achannelled head on the free end of the standard and adjacent the rockingbeam, a block slidably mounted in the channelled head and having arecess having connected horizontally disposed portions vertically oil'-set with respect to each other, a pin extending laterally from therocking beam and disposed in the recess, a lever pivotally mounted onthe reservoir, and connected to the piston rods for actuation thereby,said lever operatively connected to the slot for imparting reciprocatorymovement thereto and means for exhausting the air from the cylinder. 7

In testimony whereof I affix my signature.

HARRY B. ARCHER.

ing the valves toward closing position, push rods slidably extendingthrough the wall of the reservoir and engaged with the tails foralternately opening the valves for admitting air to the opposite ends ofthe cylinder, a rocking beam adjustably and pivotally mounted on theexterior of the reservoir and having its opposite ends engaged with theadjacent ends of the push rods for actuating the latter, means actuatedby the piston rod for rocking-said beam and means actuated by the pistonrod for exhausting the'air from the cylinder; 7 I

2. A compressed air engine of the character described comprising acylinder, a piston mounted for reciprocation in the cylinder, a pistonrodconnected to said piston, a compressed air reservoir associated withthe cylinder, pipes communicating with the reser-. voir and with theopposite end portion of the cylinder, said pipes extending in to saidreservoir, valve seats formed on the ends ofthe pipes within thereservoir, spring controlled valves pivotally mounted in the reservoiradjacent the pipes and adapted to seat on the valve seats for closingthe pipes, push rods slidably extending into the reservoir forengagement with the valves for alternately opening the same, a rockingbeam having its intermediate portion pivotally mounted, on'

